After graduating with a degree in Literature from Parigi III – Sorbonne Nouvelle, Marois became a photographer, then film director and producer. Between 1992 and 2000 he made numerous critically-acclaimed, short films, and several films with Spike Lee, in Paris and New York. His most successful films as a writer and/or producer, between 1999 and 2009, include: Live Virgin, Mary, Babel, I come with the rain and South of the Border. During his cinematographic career, Marois became an entrepreneur in the hotel sector in 2005.
In Paris, he created the famous club Les Bains Douches. He created many partnerships and events, including a three-month exhibition with Magda Danysz in 2013. In 2015 Marois opened Les Bains in Paris, a five-star hotel, which is a unique and exclusive space.